Multiple choice

Page fault occurs when

  1. the page is not in main memory

  2. the page is in main memory

  3. the page is corrupted by application software

  4. we try to divide a number by zero

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A page fault is triggered when the CPU references a virtual memory page not currently loaded in physical RAM. The OS must then load it from disk. Option B describes normal operation, C is a different error, and D is a software exception.